JOHN C MAYNARD (MD) – Nephrology Physician, NPI 1730180878
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
629 NEPHROLOGY in IL
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Provider Addresses for JOHN C MAYNARD (MD)
612, Roxbury Road, Regents Park, Rockford, Winnebago County, Illinois, 61107, United States
ROCKFORD, IL 611075089
Phone: (815) 227-8300
Fax: (815) 227-8301
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $130.
Total Amount is formed as General ($130) + Research ($0) + Ownership ($0) = $130.
Last reported payment date: 2023-02-02 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($130).
Total Amount
$130
General + Research + Ownership
Payments
1
Total payment records
General Amount
$130
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-02-02
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $130 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2008-06-02
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050113001026 | I | Nephrology | IL | TBD |
| I20080602000324 | I | Nephrology | WI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 321 | 232 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 272 | 158 | $0 |
| 90966 | Home dialysis services per month (20 years or older) | 98 | 47 | $0 |
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 97 | 12 | $0 |
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 85 | 40 | $0 |
Insurance plans in this area (ZIP 61107)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| NEPHROLOGY | IL | 90935 | Hemodialysis procedure with one physician evaluation | 55 | 49 |
| NEPHROLOGY | IL | 90961 | Dialysis services (2-3 physician visits per month), patient 20 years of age and older | 75 | 39 |
| NEPHROLOGY | IL | 90966 | Home dialysis services per month, patient 20 years of age or older | 90 | 49 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| N E P H R O L O G Y | IL | |
| Internal Medicine, Nephrology | IL | |
| Nephrology, Internal Medicine | IL | |
| N E P H R O L O G Y | IL | |
| Nurse Practitioner | IL | |
| Nurse Practitioner | IL | |
| Nurse Practitioner | IL | |
| Nephrology, Internal Medicine | PA | |
| N E P H R O L O G Y | IL | |
| Nurse Practitioner | WI |
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